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SAGE Publications, 2012
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Informa UK Limited, 2011
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Informa UK Limited, 2010
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Informa UK Limited, 2008
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SAGE Publications, 2006
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Informa UK Limited, 2007
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Informa UK Limited, 2006
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Informa UK Limited, 2005
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SAGE Publications, 2005
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Informa UK Limited, 2005
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SAGE Publications, 2005
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Informa UK Limited, 2004
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Informa UK Limited, 2003
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Informa UK Limited, 2003
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Informa UK Limited, 2003
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Informa UK Limited, 2004
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Informa UK Limited, 2003
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Informa UK Limited, 2001
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Informa UK Limited, 2002
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Informa UK Limited, 2001